准噶尔盆地煤岩气的勘探发现及意义  

Discovery and significance of coal measure gas in Junggar Basin

作　　者：郭绪杰 支东明[2] 毛新军[2] 王小军[2] 易士威[3] 朱明[2] 甘仁忠[2] 武雪琼 Guo Xujie;Zhi Dongming;Mao Xinjun;Wang Xiaojun;Yi Shiwei;Zhu Ming;Gan Renzhong;Wu Xueqiong(PetroChina Exploration&Production Company;PetroChina Xinjiang Oilfield Company;PetroChina Research Institute of Petroleum Exploration&Development)

机构地区：[1]中国石油勘探与生产分公司 [2]中国石油新疆油田公司 [3]中国石油勘探开发研究院

出　　处：《中国石油勘探》2021年第6期38-49,共12页China Petroleum Exploration

基　　金：国家科技重大专项“大型气田成藏机制、富集规律与勘探新领域”(2016ZX05007-003)。

摘　　要：基于对准噶尔盆地侏罗系八道湾组和西山窑组煤岩储层、天然气地球化学特征,以及煤层气井试气结果的分析,提出在侏罗系煤层中存在既不同于煤层气、也不同于常规气的一种新的聚集类型的天然气——煤岩气。煤岩气是介于常规气和煤层气之间的一种新的天然气资源类型,具有常规储层和非常规储层共存,游离气和吸附气共生,自源气和它源气互补聚集、有序分布的特征。针对这一新的勘探领域,优选白家海凸起彩31井断背斜构造,以侏罗系西山窑组煤层为目的层部署风险探井——彩探1H井,试气获得最高日产5.7×10^(4)m^(3)、稳产日产2×10^(4)m^(3)的工业气流,实现了煤岩气勘探的重大发现。煤岩气的提出与勘探发现实现了天然气地质认识新突破,开辟了天然气勘探新领域,引领了天然气勘探新方向,对含煤盆地天然气勘探具有重要且深远的影响。Based on the analysis of reservoir in coal measure strata,geochemical characteristics of natural gas,as well as the test results of CBM wells,a new type of natural gas–coal measure gas of the Jurassic Badaowan Formation and Xishanyao Formation is proposed in this study,which is different from both coalbed methane and conventional gas,and characterized by coexistence of conventional and unconventional reservoirs,symbiosis of free gas and adsorbed gas,complementary accumulation and orderly distribution of self-generated and other-source gas.Aiming at this new exploration field,Well Caitan 1H has been deployed in Cai 31 faulted anticline structure in Baijiahai Bulge with the target layer of coal seam of the Jurassic Xishanyao Formation and great discovery of coal measure gas been achieved with the highest gas production of 5.7×10^(4) m^(3)/d and stable gas production of 2×10^(4) m^(3)/d during the well test,which enables a new breakthrough in geology understanding of natural gas,opens up a new field of natural gas exploration,guides a new direction of natural gas exploration,and has a major and far-reaching significance on gas exploration in coal bearing basins.

关 键 词：准噶尔盆地 白家海凸起 侏罗系 煤岩气 煤岩储层 成藏模式 

分 类 号：TE112.111[石油与天然气工程—油气勘探]